7
3 can go into both these numbers 72/3= 24 21/3= 7
First you have to make the same denominators: Find the lowest number that 7 and 3 both go into which is 21. So multiply the denominator by the number that makes 21 on both 2/7 and 1/3. Make sure to multiply the number you used on den. on the numerator to. Here are the new fractions: 6/21 and 7/21 Then subtract as normal. Answer would be negative 1/21 or -1/21
1, 3, 7, 21.
7 3 x 7 = 21 6 x 7 = 42
7
1 and 7 both can.
3 can go into both these numbers 72/3= 24 21/3= 7
The (LCM) Least Common Multiple of 7 and 3 is 21 because that is the LEAST number that both 3 and 7 go into.
The (LCM) Least Common Multiple of 7 and 3 is 21 because that is the LEAST number that both 3 and 7 go into.
21
21 = 3 x 7 both 3 and 7 are prime numbers
7
First you have to make the same denominators: Find the lowest number that 7 and 3 both go into which is 21. So multiply the denominator by the number that makes 21 on both 2/7 and 1/3. Make sure to multiply the number you used on den. on the numerator to. Here are the new fractions: 6/21 and 7/21 Then subtract as normal. Answer would be negative 1/21 or -1/21
1, 3, 7, 21.
A number that is divisible by both 3 and 7 must be a multiple of their least common multiple, which is 21. Therefore, any number that is a multiple of 21 will be divisible by both 3 and 7. Examples of such numbers include 21, 42, 63, 84, and so on.
7 3 x 7 = 21 6 x 7 = 42